In its tally, Wealth-X counted alumni with both undergraduate and graduate degrees, counting alumni of multiple institutions more than once, but left out those with diplomas, certificates, honorary degrees, and drop outs.

According to the report, 131 living billionaires are Harvard University alumni, commanding a total fortune of more than $528 billion. And that doesn’t include Harvard drop outs Mark Zuckerberg and Bill Gates, two of the richest men in the world.

The next highest-billionaire producing school is Stanford University, with 50 known billionaire alumni.

Below, check out the 10 US colleges that have minted the most billionaires, and how much wealth they command.

10. University of California, Berkeley

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Eric Schmidt, executive chairman of Google, class of 1982.

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Justin Sullivan/Getty Images

Known billionaires: 19

Combined wealth: $82.7 billion

(TIE) 8. Yale University

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Stephen Schwarzman, chairman and CEO of the Blackstone Group, class of 1969.

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Alex Wong/Getty

Known billionaires: 21

Combined wealth: $99.2 billion

(TIE) 8. University of Chicago

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David Rubenstein, cofounder and co-CEO of Carlyle Group, class of 1973.

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REUTERS/Fred Prouser

Known billionaires: 21

Combined wealth: $48.7 billion

7. University of Southern California

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George Lucas, founder of Lucasfilm and creator of the Star Wars franchise, class of 1967.